摘要:
A method for producing a propylene-based block copolymer ensures excellent olefin polymerization activity and activity with respect to hydrogen (hydrogen response) during polymerization, and produces a propylene-based block copolymer that exhibits a high MFR, high stereoregularity, and excellent rigidity. The method includes copolymerizing propylene and an α-olefin in the presence of a catalyst that includes (I) a solid catalyst component that includes titanium, magnesium, a halogen, and a compound represented by R1O—C(═O)—O—Z—OR2, and (II) a compound represented by R3pAlQ3-p, to obtain a propylene-based block copolymer.
摘要:
A resin composition according to an aspect of the present invention comprises: an ethylene-vinyl alcohol copolymer (A); and a block copolymer (B) having a block (b1) that includes a vinyl aromatic monomer unit, and a block (b2) that includes an isobutylene unit, wherein the ethylene-vinyl alcohol copolymer (A) and the block copolymer (B) form a co-continuous phase structure; and a DSC curve obtained following heating the resin composition up to a melting point and cooling at a rate of 50° C./min in a differential scanning calorimetry analysis shows two peaks, with a higher peak top temperature falling within a range of 130° C. or greater and 170° C. or less, and a lower peak top temperature falling within a range of 100° C. or greater and less than 130° C. A resin composition may thus be obtained that is able to give a molded article that is superior in balance between gas barrier properties and flexibility.
摘要:
Disclosed are self-assembling diblock copolymers of the formula (I): wherein R1 is —(CHR—CH2—O)p—R′, p=2-6, R is H or methyl, and R′ is H, C1-C6 alkyl, or C3-C11 cycloalkyl, R2 is C6-C20 aryl, one of R3 and R4 is C6-C14 aryl or heteroaryl, and the other is C1-C22 alkoxy, and n and m are independently 2 to about 2000, which find use in preparing self-assembled structures and porous membranes. Embodiments of the self-assembled structures contain the diblock copolymer in a cylindrical morphology. Also disclosed is a method of preparing such copolymers.
摘要:
Disclosed are self-assembling block copolymers including diblock copolymers of the formula (I): wherein R1 is —(CHR—CH2—O)p—R′, p=2-6, R is H or methyl, and R′ is H, a C1-C6 alkyl or C3-C11 cycloalkyl, R2 is C6-C20 aryl or heteroaryl, one of R3 and R4 is C6-C14 aryl and the other is C1-C22 alkoxy, and n and m are independently 2 to about 2000, which find use in preparing self-assembled structures and porous membranes. Embodiments of the self-assembled structures contain the block copolymer in a cylindrical morphology. Also disclosed is a method of preparing such copolymers.
摘要:
A solid catalyst component for olefin polymerization makes it possible to polymerize an olefin with high polymerization activity when used for an olefin polymerization catalyst, and produce an olefin polymer having a low fine powder content, a low coarse powder content, and a low volatile organic compound (VOC) content in high yield. The solid catalyst component for olefin polymerization is produced by suspending (a) a dialkoxymagnesium, and (b) at least one alcohol selected from ethanol, n-propanol, n-butanol, isopropanol, isobutanol, and t-butanol, in an inert organic solvent so that the total amount of the alcohol is 0.5 to 1.5 parts by mass based on 100 parts by mass of the dialkoxymagnesium, to prepare a suspension, and bringing (c) an internal electron donor and (d) a titanium halide compound into contact with the suspension.
摘要:
Improved reaction processes comprise reacting a mixture to form a product comprising a metal alkyl, metal oxide, or mixture thereof and then passing said product to a post-reactor heat exchanger. The improvement comprises one or more of the following: (1) reacting said metal alkyl compound with an acid to produce a soluble metal ester; or (2) adding an ionic surfactant; or (3) adding a mixture comprising an antioxidant to the product under conditions sufficient to avoid formation of significant amounts of insoluble metal or metal compounds derived from said metal alkyl compound; or (4) purging said post-reactor heat exchanger with an inert gas under conditions to remove metal oxide from the post-reactor heat exchanger.
摘要:
Disclosed is a polypropylene resin composition including: 100 parts by weight of (A) a propylene-based block copolymer including polymer components (I) and (II), wherein the polymer component (I) is a propylene polymer having an intrinsic viscosity [η]I of 0.1-5 dl/g, the polymer component (II) is a propylene polymer comprising propylene units and units of at least one comonomer selected from the group consisting of ethylene and α-olefins having 4-12 carbon atoms and having an intrinsic viscosity [η]II of from 1-20 dl/g and the content of the polymer component (II) is 1-70% by weight; and 0.001-5 parts by weight of (B) a nucleating agent composed of particles having an average particle diameter, as measured by the laser diffraction method, of 0.01-3 mm wherein particles having particle diameters of not less than 10 mm account for less than 5% by weight of all the particles of the nucleating agent.
摘要:
Embodiments of the invention provide a comb architecture olefin block copolymer, a method of making the comb olefin block copolymer and blends comprising the comb olefin block copolymer.
摘要:
This invention relates to a process for polymerizing olefins in which the amount of trimethylaluminum in a methylalumoxane solution is adjusted to be from 1 to 25 mol %, prior to use as an activator, where the mol % trimethylaluminum is determined by 1H NMR of the solution prior to combination with any support. This invention also relates to a process for polymerizing olefins in which the amount of an unknown species present in a methylalumoxane solution is adjusted to be from 0.10 to 0.65 integration units prior to use as an activator, where the amount of the unknown species is determined by the 1H NMR spectra of the solution performed prior to combination with any support. Preferably, the methylalumoxane solution is present in a catalyst system also comprising a metallocene transition metal compound.
摘要翻译:本发明涉及一种聚合烯烃的方法,其中在用作活化剂之前,将甲基铝氧烷溶液中的三甲基铝的量调节至1至25mol%,其中通过溶液的1 H NMR确定摩尔%的三甲基铝 在与任何支持组合之前。 本发明还涉及一种聚合烯烃的方法,其中存在于甲基铝氧烷溶液中的未知物质的量在使用前调节为0.10至0.65个整合单元作为活化剂,其中未知物质的量由 在与任何载体组合之前进行的溶液的1 H NMR光谱。 优选地,甲基铝氧烷溶液存在于还包含茂金属过渡金属化合物的催化剂体系中。
摘要:
The present invention relates to copolymers with polar and non-polar olefin blocks with a variable polar monomer content of 0.1 mol % to 99.9 mol %. The invention also relates to a method for obtaining copolymers with olefin blocks and vinyl polar monomer blocks, said method using a single-component catalytic system made up of an organometallic complex containing a metal belonging to groups VIII to X. Said organometallic complex is advantageously active in the medium without adding cocatalyst.